Post by TechMystI work for a plastics company which uses concentrates that are added to rawresins. Imagine orange juice concentrate that you add to "raw" water.Ok, Lets say that a concentrate is 'let down' at 4%. That means that ifyou weigh out 100 grams of raw resin you will add 4 grams of concentrate;giving you 104 grams total material...25 : 1 (twenty-five to one)but most people put25 / 1is there a difference here, does it matter?I thought 25 : 1 meant there were 26 total parts; with one part beingconcentrate and 25 parts being raw resin.vs25/1 being 25 total parts with one of them being concentrate and 24 beingraw resin...which would mean that you would have 100 grams total materialwith 4 grams of it being concentratejust curious...ce

This is not a mathematics question .You want to know what the chemists meanwhen they write 25/1.That is what is the 25 and 1 referring to as you areasking us.My guess is it means the same as your 25:1 since this is moreuseful in the preparation of the product .Regards smn